Note 7 - Fair Value Measurements - Derivative Liability Measured at Fair Value (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Mar. 31, 2026 |
|
| Change in fair value | $ (1,332) | $ 0 | $ (9,447) | $ 0 | $ (9,447) | $ 0 | |
| Comtrafo Industria de Transformadores Eletricos S.A. (Comtrafo) [Member] | |||||||
| Change in fair value | 1,300 | $ 0 | 9,400 | 0 | 9,400 | $ 0 | |
| Derivative Financial Instruments, Liabilities [Member] | Comtrafo Industria de Transformadores Eletricos S.A. (Comtrafo) [Member] | |||||||
| Balance | 39,529 | $ 0 | $ 0 | ||||
| Issuance of contingent consideration | 34,815 | ||||||
| Change in fair value | (9,447) | 4,171 | |||||
| FX Impact | 403 | 543 | |||||
| Balance | $ 30,485 | $ 30,485 | $ 30,485 | $ 39,529 | |||